Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 36
F 38. Roving of a three and two sheave pair ofblocks, with a draw block fixed above. P = W —. W = P X 6.o THE MECHANICAL POWERS. 25 … 39. Roving of a two and three sheave pair oiblocks, with end of rope fixed to lower block. P=:W . —. W =1 P X 5.5 40. CHINESE WINDLASS.—The sheave and hook rises equal to one-half the difference in the circumference of the barrels for each i=> turn of the crank. See No. 27 for the power. 41.…
Mechanical movements
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